Distribution: Occurring west of the Cascades crest in Washington; Washington to northwest California, disjunct in northern Idaho.
Habitat: Meadows and moist woods in the coastal mountains and up to 6000 feet in the Cascades.
Flowers: May-August
Origin: Native
Growth Duration: Perennial
Conservation Status: Not of concern
Pollination: Apomixis, bumblebees, flies
Acaulescent perennials with stout, scaly rhizomes.
Petioles 5-20 cm. long, usually with soft, brownish hairs; leaves trifoliate, the leaf blades 5-8 cm. broad, obovate with a wedge-shaped base.
Scapes 3- to 7-flowered; sepals 5, persistent; petals 5, about 1 cm. long, white or tinged with pink, shallowly notched; stamens 10, united basally, of 2 unequal lengths; styles 5, the stigmas capitate.
Capsule linear, 2-3 cm. long, with a slender beak
Publication: Flora Boreali-Americana 1(3): 118. (as trilliifolium). 1831.
PNW Herbaria: Specimen records of Oxalis trilliifolia in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Oxalis trilliifolia checklist entry
OregonFlora: Oxalis trilliifolia information
E-Flora BC: Oxalis trilliifolia atlas page
CalPhotos: Oxalis trilliifolia photos
